Exporting master flats
Stacking program, astrometric (plate) solver, fits file viewer
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han59
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Hello, im trying to use master flats generated for some older data in Pixinsight weighted batch preprocessing script. Sadly, i end with horrible purple image. Anyone can help me how to convert it to usable flat also for PI ? Thank you very much :)
Purple indicates that the DeBayer method is set wrong. A flat can not be the cause.
The flats are normal FITS files. The bias/flat dark is already subtracted but that doesn't effect the colour in any way. Any program should be able to use them.
Han
Thank you for your reply, sadly, it is as it is. the flats are somehow incorrect for PI. They work in ASTAP, and dont in PI. :) im loading same data for PI as for ASTAP.
Share some files and I will have look to the PI handling.
But try also to stack the images without the flats. The flats should have no influence on the colour whatsoever.
www.uschovna.cz/zasilka/MP9JWKKJ28TFY6GZ-C2U
ASTAP - no_object, 2023-03-02, 3x300L, EQMod Mount, ZWO ASI2600MC Pro_average_stacked.fits - ASTAP stacked
PI - masterLight_BIN-1_6248x4176_EXPOSURE-300.00s_FILTER-NoFilter_RGB_autocrop.xisf
- PI stacked
PI after SPCC - masterLight_BIN-1_6248x4176_EXPOSURE-300.00s_FILTER-NoFilter_RGB_autocrop.xisf
- PI stacked + SPCC
(ASTAP after SPCC will be also clear without any problem)
All these files are stacked from the data in zip.
I think I found the cause. Now the image background is flat, only greenish. See attached
Just save in ASTAP the master flat and master dark to a 16 bit fits file. PI can't handle properly flats/darks written in the floating point format. :( (This should be reported as a bug.)
Just open the masters in ASTAP and save again while selecting 16 bit FITS format. See attached screenshot. Probably it is better to give them an new name to preserve the original.
Han
Last edit: han.k 2023-09-14
:)))) thank you VERY much, seems like you found it, i will test it later. By the way the greenish bg is always happening, just simply use SPCC process to get normal colors.